libsigrok/sigrok.h

361 lines
8.6 KiB
C

/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SIGROK_SIGROK_H
#define SIGROK_SIGROK_H
#include <stdio.h>
#include <sys/time.h>
#include <stdint.h>
#include <inttypes.h>
#include <glib.h>
#ifdef HAVE_LIBUSB_1_0
#include <libusb.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Status/error codes returned by libsigrok functions.
*
* All possible return codes of libsigrok functions must be listed here.
* Functions should never return hardcoded numbers as status, but rather
* use these #defines instead. All error codes are negative numbers.
*
* The error codes are globally unique in libsigrok, i.e. if one of the
* libsigrok functions returns a "malloc error" it must be exactly the same
* return value as used by all other functions to indicate "malloc error".
* There must be no functions which indicate two different errors via the
* same return code.
*
* Also, for compatibility reasons, no defined return codes are ever removed
* or reused for different #defines later. You can only add new #defines and
* return codes, but never remove or redefine existing ones.
*/
#define SR_OK 0 /* No error */
#define SR_ERR -1 /* Generic/unspecified error */
#define SR_ERR_MALLOC -2 /* Malloc/calloc/realloc error */
#define SR_ERR_SAMPLERATE -3 /* Incorrect samplerate */
/* limited by uint64_t */
#define MAX_NUM_PROBES 64
#define MAX_PROBENAME_LEN 32
/* Handy little macros */
#define KHZ(n) ((n) * 1000)
#define MHZ(n) ((n) * 1000000)
#define GHZ(n) ((n) * 1000000000)
#define HZ_TO_NS(n) (1000000000 / (n))
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#endif
#ifndef ARRAY_AND_SIZE
#define ARRAY_AND_SIZE(a) (a), ARRAY_SIZE(a)
#endif
typedef int (*receive_data_callback) (int fd, int revents, void *user_data);
/* Data types used by hardware plugins for set_configuration() */
enum {
SR_T_UINT64,
SR_T_CHAR,
SR_T_NULL,
};
enum {
SR_PROTO_RAW,
};
/* (Unused) protocol decoder stack entry */
struct protocol {
char *name;
int id;
int stackindex;
};
/* sr_datafeed_packet.type values */
enum {
SR_DF_HEADER,
SR_DF_END,
SR_DF_TRIGGER,
SR_DF_LOGIC,
SR_DF_ANALOG,
SR_DF_PD,
};
struct sr_datafeed_packet {
uint16_t type;
uint64_t length;
uint16_t unitsize;
void *payload;
};
struct sr_datafeed_header {
int feed_version;
struct timeval starttime;
uint64_t samplerate;
int protocol_id;
int num_analog_probes;
int num_logic_probes;
};
struct analog_probe {
uint8_t att;
uint8_t res; /* Needs to be a power of 2, FIXME */
uint16_t val; /* Max hardware ADC width is 16bits */
};
struct analog_sample {
uint8_t num_probes; /* Max hardware probes is 256 */
struct analog_probe probes[];
};
struct sr_input {
struct sr_input_format *format;
char *param;
struct sr_device *vdevice;
};
struct sr_input_format {
char *extension;
char *description;
int (*format_match) (const char *filename);
int (*init) (struct sr_input *in);
int (*loadfile) (struct sr_input *in, const char *filename);
};
struct sr_output {
struct sr_output_format *format;
struct sr_device *device;
char *param;
void *internal;
};
struct sr_output_format {
char *extension;
char *description;
int df_type;
int (*init) (struct sr_output *o);
int (*data) (struct sr_output *o, char *data_in, uint64_t length_in,
char **data_out, uint64_t *length_out);
int (*event) (struct sr_output *o, int event_type, char **data_out,
uint64_t *length_out);
};
struct analyzer {
char *name;
char *filename;
/*
* TODO: Parameters? If so, configured plugins need another struct.
* TODO: Input and output format?
*/
};
/* Size of a chunk in units */
#define DATASTORE_CHUNKSIZE 512000
struct sr_datastore {
/* Size in bytes of the number of units stored in this datastore */
int ds_unitsize;
unsigned int num_units; /* TODO: uint64_t */
GSList *chunklist;
};
/*
* This represents a generic device connected to the system.
* For device-specific information, ask the plugin. The plugin_index refers
* to the device index within that plugin; it may be handling more than one
* device. All relevant plugin calls take a device_index parameter for this.
*/
struct sr_device {
/* Which plugin handles this device */
struct sr_device_plugin *plugin;
/* A plugin may handle multiple devices of the same type */
int plugin_index;
/* List of struct sr_probe* */
GSList *probes;
/* Data acquired by this device, if any */
struct sr_datastore *datastore;
};
enum {
SR_PROBE_TYPE_LOGIC,
SR_PROBE_TYPE_ANALOG,
};
struct sr_probe {
int index;
int type;
gboolean enabled;
char *name;
char *trigger;
};
extern GSList *devices;
/* Hardware plugin capabilities */
enum {
SR_HWCAP_DUMMY, /* Used to terminate lists */
/* device classes */
SR_HWCAP_LOGIC_ANALYZER,
/* device options */
SR_HWCAP_SAMPLERATE, /* Change samplerate */
SR_HWCAP_PROBECONFIG, /* Configure probe mask */
SR_HWCAP_CAPTURE_RATIO, /* Set pre/post-trigger capture ratio */
SR_HWCAP_PATTERN_MODE, /* Pattern generator mode */
/* special stuff */
SR_HWCAP_CAPTUREFILE, /* capturefile to inject */
SR_HWCAP_CAPTURE_UNITSIZE, /* unitsize of capturefile data */
SR_HWCAP_CAPTURE_NUM_PROBES,/* set number of probes */
/* acquisition modes */
SR_HWCAP_LIMIT_MSEC, /* Set a time limit for sample acquisition */
SR_HWCAP_LIMIT_SAMPLES, /* Set a limit on number of samples */
SR_HWCAP_CONTINUOUS,
};
struct sr_hwcap_option {
int capability;
int type;
char *description;
char *shortname;
};
struct sr_device_instance {
int index;
int status;
int instance_type;
char *vendor;
char *model;
char *version;
void *priv;
union {
struct sr_usb_device_instance *usb;
struct sr_serial_device_instance *serial;
};
};
/* sr_device_instance types */
enum {
SR_USB_INSTANCE,
SR_SERIAL_INSTANCE,
};
#ifdef HAVE_LIBUSB_1_0
struct sr_usb_device_instance {
uint8_t bus;
uint8_t address;
struct libusb_device_handle *devhdl;
};
#endif
struct sr_serial_device_instance {
char *port;
int fd;
};
/* Device instance status */
enum {
SR_ST_NOT_FOUND,
/* Found, but still booting */
SR_ST_INITIALIZING,
/* Live, but not in use */
SR_ST_INACTIVE,
/* Actively in use in a session */
SR_ST_ACTIVE,
};
/*
* TODO: This sucks, you just kinda have to "know" the returned type.
* TODO: Need a DI to return the number of trigger stages supported.
*/
/* Device info IDs */
enum {
/* struct sr_device_instance for this specific device */
SR_DI_INSTANCE,
/* The number of probes connected to this device */
SR_DI_NUM_PROBES,
/* Samplerates supported by this device, (struct sr_samplerates) */
SR_DI_SAMPLERATES,
/* Types of trigger supported, out of "01crf" (char *) */
SR_DI_TRIGGER_TYPES,
/* The currently set samplerate in Hz (uint64_t) */
SR_DI_CUR_SAMPLERATE,
/* Supported pattern generator modes */
SR_DI_PATTERNMODES,
};
/*
* A device supports either a range of samplerates with steps of a given
* granularity, or is limited to a set of defined samplerates. Use either
* step or list, but not both.
*/
struct sr_samplerates {
uint64_t low;
uint64_t high;
uint64_t step;
uint64_t *list;
};
struct sr_device_plugin {
/* Plugin-specific */
char *name;
char *longname;
int api_version;
int (*init) (char *deviceinfo);
void (*cleanup) (void);
/* Device-specific */
int (*open) (int device_index);
void (*close) (int device_index);
void *(*get_device_info) (int device_index, int device_info_id);
int (*get_status) (int device_index);
int *(*get_capabilities) (void);
int (*set_configuration) (int device_index, int capability, void *value);
int (*start_acquisition) (int device_index, gpointer session_device_id);
void (*stop_acquisition) (int device_index, gpointer session_device_id);
};
struct sr_session {
/* List of struct sr_device* */
GSList *devices;
/* List of struct analyzer* */
GSList *analyzers;
/* list of receive_data_callback */
GSList *datafeed_callbacks;
GTimeVal starttime;
gboolean running;
};
#include "sigrok-proto.h"
#ifdef __cplusplus
}
#endif
#endif